Optical imaging lens assembly

ABSTRACT

This invention provides an optical imaging lens assembly comprising five lens elements with refractive power, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power; a fourth lens element with negative refractive power having at least one of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element having a concave image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric, and made of plastic. By such arrangement, photosensitivity and total track length of the optical imaging lens assembly can be reduced, and the aberration and astigmatism of the assembly can be effectively corrected. Moreover, high image resolution can be obtained.

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. §119(a)on Patent Application No. 099135183 filed in Taiwan, R.O.C. on Oct. 15,2010, the entire contents of which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an optical imaging lens assembly, andmore particularly, to a compact optical imaging lens assembly used in anelectronic product.

2. Description of the Prior Art

The demand for compact imaging lens assembly has grown in recent yearsas the popularity of portable electronic products with the photographingfunction has increased. The sensor of a general photographing camera isnone other than CCD (Charge Coupled Device) or CMOS (Complementary MetalOxide Semiconductor Sensor). Furthermore, as advanced semiconductormanufacturing technology has allowed the pixel size of sensors to bereduced, and the resolution of compact imaging lenses has graduallyincreased, there is an increasing demand for compact imaging lensassembly featuring better image quality.

A conventional compact imaging lens system equipped on a portableelectronic product, such as the one set forth in U.S. Pat. No.7,365,920, generally has a main structure of four lens elements.However, due to the popularity of high standard mobile devices such assmart phones and PDAs (Personal Digital Assistant) driving the rapidimprovements in high resolution and image quality of the current compactimaging lens systems, conventional four lens elements systems no longersatisfy the higher level camera modules.

Inasmuch as the foregoing, a need exists in the art for an opticalimaging lens assembly that features better image quality and is compactwhile maintaining a moderate total track length.

SUMMARY OF THE INVENTION

The present invention provides an optical imaging lens assemblycomprising five lens elements with refractive power, in order from anobject side to an image side: a first lens element with positiverefractive power having a convex object-side surface; a second lenselement with negative refractive power; a third lens element withnegative refractive power; a fourth lens element with negativerefractive power, and at least one of the object-side and image-sidesurfaces thereof being aspheric; and a fifth lens element having aconcave image-side surface, at least one of the object-side andimage-side surfaces thereof being aspheric, and the fifth lens elementis made of plastic; wherein a focal length of the second lens element isf2, a focal length of the third lens element is f3, and they satisfy therelation: 0<f2/f3<1.7.

On the other hand, the present invention provides an optical imaginglens assembly comprising five lens elements with refractive power, inorder from an object side to an image side: a first lens element withpositive refractive power having a convex object-side surface; a secondlens element with negative refractive power; a third lens element withnegative refractive power; a fourth lens element having a convexobject-side surface and a concave image-side surface, and at least oneof the object-side and image-side surfaces thereof being aspheric; and afifth lens element having a concave image-side surface, at least one ofthe object-side and image-side surfaces thereof being aspheric, and atleast one inflection point is formed on at least one of the object-sideand image-side surfaces thereof; wherein a focal length of the secondlens element is f2, a focal length of the third lens element is f3, theoptical imaging lens assembly further comprises an aperture stop, adistance on an optical axis between the aperture stop and an image planeis SL, a distance on the optical axis between the object-side surface ofthe first lens element and the image plane is TTL, and they satisfy therelation: 0<f2/f3<1.7; and 0.65<SL/TTL<0.92.

By such arrangement, photosensitivity and total track length of theoptical imaging lens assembly can be reduced, and the aberration andastigmatism of the assembly can be effectively corrected. Moreover, highimage resolution can be obtained.

In the aforementioned optical imaging lens assembly, the first lenselement has positive refractive power and thereby can provide the mainrefractive power that the assembly needs, which is favorable forreducing the total track length of the optical imaging lens assembly.The second lens element has negative refractive power, and thereby theaberration produced by the first lens element can be effectivelycorrected and the chromatic aberration of the system can be favorablycorrected in the same time. The third lens element has negativerefractive power and thereby can cooperate with the second lens elementfor aberration correction, chromatic aberration correction and reducingthe sensitivity of the assembly. The fourth lens element has negativerefractive power, and thereby the Petzval Sum of the assembly can befavorably corrected so that enabling the peripheral image plane tobecome flatter. When the fifth lens element has positive refractivepower, the total optical track length of the assembly can be favorablyreduced and thereby keeping the lens compact.

In the aforementioned optical imaging lens assembly, the first lenselement may be a bi-convex lens element or a meniscus lens elementhaving a convex object-side surface and a concave image-side surface;when the first lens element is a bi-convex lens element, thedistribution of the refractive power of the first lens element can beeffectively improved, and thereby the total track length of the opticalimaging lens assembly can be further shortened; when the first lenselement is a meniscus lens element having a convex object-side surfaceand a concave image-side surface, the astigmatism of the assembly isfavorably corrected. When the second lens element has a concaveimage-side surface, the back focal length of the assembly is enlargedeffectively and thereby ensuring that the optical imaging lens assemblyhas enough back focal length for placing other elements. When the thirdlens element has a concave object-side surface and a convex image-sidesurface, the astigmatism of the assembly is favorably corrected. Whenthe fourth lens element has a convex object-side surface and a concaveimage-side surface, a balance between enlarging the back focal lengthand reducing the total track length of the optical imaging lens assemblycan be favorably obtained, and the aberration of the assembly can beeffectively corrected. When the fifth lens element has a concaveimage-side surface, the principal point of the optical system can bepositioned away from the image plane and thereby reducing the totaloptical track length of the system for keeping the lens compact. Whenthe fifth lens element has a convex object-side surface and a concaveimage-side surface, the astigmatism and the high order aberration of theassembly can be favorably corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A shows an optical imaging lens assembly in accordance with afirst embodiment of the present invention.

FIG. 1B shows the aberration curves of the first embodiment of thepresent invention.

FIG. 2A shows an optical imaging lens assembly in accordance with asecond embodiment of the present invention.

FIG. 2B shows the aberration curves of the second embodiment of thepresent invention.

FIG. 3A shows an optical imaging lens assembly in accordance with athird embodiment of the present invention.

FIG. 3B shows the aberration curves of the third embodiment of thepresent invention.

FIG. 4A shows an optical imaging lens assembly in accordance with afourth embodiment of the present invention.

FIG. 4B shows the aberration curves of the fourth embodiment of thepresent invention.

FIG. 5A shows an optical imaging lens assembly in accordance with afifth embodiment of the present invention.

FIG. 5B shows the aberration curves of the fifth embodiment of thepresent invention.

FIG. 6A shows an optical imaging lens assembly in accordance with asixth embodiment of the present invention.

FIG. 6B shows the aberration curves of the sixth embodiment of thepresent invention.

FIG. 7A shows an optical imaging lens assembly in accordance with aseventh embodiment of the present invention.

FIG. 7B shows the aberration curves of the seventh embodiment of thepresent invention.

FIG. 8A shows an optical imaging lens assembly in accordance with aneighth embodiment of the present invention.

FIG. 8B shows the aberration curves of the eighth embodiment of thepresent invention.

FIG. 9A shows an optical imaging lens assembly in accordance with aninth embodiment of the present invention.

FIG. 9B shows the aberration curves of the ninth embodiment of thepresent invention.

FIG. 10A shows an optical imaging lens assembly in accordance with atenth embodiment of the present invention.

FIG. 10B shows the aberration curves of the tenth embodiment of thepresent invention.

FIG. 11 is TABLE 1 which lists the optical data of the first embodiment.

FIG. 12 is TABLE 2 which lists the aspheric surface data of the firstembodiment.

FIG. 13 is TABLE 3 which lists the optical data of the secondembodiment.

FIG. 14 is TABLE 4 which lists the aspheric surface data of the secondembodiment.

FIG. 15 is TABLE 5 which lists the optical data of the third embodiment.

FIG. 16 is TABLE 6 which lists the aspheric surface data of the thirdembodiment.

FIG. 17 is TABLE 7 which lists the optical data of the fourthembodiment.

FIG. 18 is TABLE 8 which lists the aspheric surface data of the fourthembodiment.

FIG. 19 is TABLE 9 which lists the optical data of the fifth embodiment.

FIG. 20 is TABLE 10 which lists the aspheric surface data of the fifthembodiment.

FIG. 21 is TABLE 11 which lists the optical data of the sixthembodiment.

FIG. 22 is TABLE 12 which lists the aspheric surface data of the sixthembodiment.

FIG. 23 is TABLE 13 which lists the optical data of the seventhembodiment.

FIG. 24 is TABLE 14 which lists the aspheric surface data of the seventhembodiment.

FIG. 25 is TABLE 15 which lists the optical data of the eighthembodiment.

FIG. 26 is TABLE 16 which lists the aspheric surface data of the eighthembodiment.

FIG. 27 is TABLE 17 which lists the optical data of the ninthembodiment.

FIG. 28 is TABLE 18 which lists the aspheric surface data of the ninthembodiment.

FIG. 29 is TABLE 19 which lists the optical data of the tenthembodiment.

FIG. 30 is TABLE 20 which lists the aspheric surface data of the tenthembodiment.

FIG. 31 is TABLE 21 which lists the data of the respective embodimentsresulting from the equations.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention provides an optical imaging lens assemblycomprising five lens elements with refractive power, in order from anobject side to an image side: a first lens element with positiverefractive power having a convex object-side surface; a second lenselement with negative refractive power; a third lens element withnegative refractive power; a fourth lens element with negativerefractive power, and at least one of the object-side and image-sidesurfaces thereof being aspheric; and a fifth lens element having aconcave image-side surface, at least one of the object-side andimage-side surfaces thereof being aspheric, and the fifth lens elementis made of plastic; wherein a focal length of the second lens element isf2, a focal length of the third lens element is f3, and they satisfy therelation: 0<f2/f3<1.7.

When the relation of 0<f2/f3<1.7 is satisfied, the distribution of thenegative refractive power of the second and the third lens elements ismore proper for reducing the sensitivity and correcting the aberrationof the assembly effectively, preferably, the following relation issatisfied: 0<f2/f3<0.7.

In the aforementioned optical imaging lens assembly, a focal length ofthe optical imaging lens assembly is f, a focal length of the third lenselement is f3, a focal length of the fourth lens element is f4, a focallength of the fifth lens element is f5, and they preferably satisfy therelation: 0<|f/f3|+|f/f4|+|f/f5|<1.7. When the above relation issatisfied, the refractive power of the third, fourth and fifth lenselements is adjusted well and thereby the sensitivity of the assemblycan be reduced; more preferably, the following relation is satisfied:0<|f/f^(3|+|f/f)4|+|f/f5<0.8.

In the aforementioned optical imaging lens assembly, an Abbe number ofthe first lens element is V1, an Abbe number of the second lens elementis V2, and they preferably satisfy the relation: 20<V1−V2<45. When theabove relation is satisfied, the chromatic aberration of the assemblycan be favorably corrected; more preferably, the following relation issatisfied: 30<V1−V2<42.

In the aforementioned optical imaging lens assembly, an Abbe number ofthe first lens element is V1, an Abbe number of the second lens elementis V2, an Abbe number of the third lens element is V3, and theypreferably satisfy the relation: −10<V1−V2−V3<20. When the aboverelation is satisfied, the chromatic aberration of the assembly can befavorably adjusted and corrected.

In the aforementioned optical imaging lens assembly, an aperture stop isfurther provided; a distance on an optical axis between the aperturestop and an image plane is SL, a distance on the optical axis betweenthe object-side surface of the first lens element and the image plane isTTL, and they preferably satisfy the relation: 0.92<SL/TTL<1.15. Whenthe above relation is satisfied, the benefits of telecentricity can beobtained while the total track length of the optical imaging lensassembly is not excessively long.

In the aforementioned optical imaging lens assembly, an aperture stop isfurther provided; a distance on an optical axis between the aperturestop and an image plane is SL, a distance on the optical axis betweenthe object-side surface of the first lens element and the image plane isTTL, and they preferably satisfy the relation: 0.65<SL/TTL<0.92. Whenthe above relation is satisfied, a good balance between telecentricityand the wide field of view can be achieved.

In the aforementioned optical imaging lens assembly, a radius ofcurvature of the object-side surface of the first lens element is R1, aradius of curvature of the image-side surface of the first lens elementis R2, and they preferably satisfy the relation: |R1/R2|<0.35. When theabove relation is satisfied, the spherical aberration is correctedfavorably.

In the aforementioned optical imaging lens assembly, a thickness of thesecond lens element on the optical axis is CT2, a focal length of theoptical imaging lens assembly is f, and they preferably satisfy therelation: 3.0<(CT2/f)*100<9.3. When the above relation is satisfied, thethickness of the second lens element is more suitable and thereby thecomplexity of manufacturing can be reduced for better yield rate of lensproduction.

In the aforementioned optical imaging lens assembly, an on-axis spacingbetween the second lens element and the third lens element is T23, afocal length of the optical imaging lens assembly is f, and theypreferably satisfy the relation: 0.40<(T23/f)*10<1.75. When the aboverelation is satisfied, the spacing between lens elements of the assemblyis more appropriate, which is not only good for the arrangement of lenselements but also a good use of space for the lens assembly and keepingthe lens assembly compact.

In the aforementioned optical imaging lens assembly, a radius ofcurvature of the object-side surface of the third lens element is R5, aradius of curvature of the image-side surface of the third lens elementis R6, a radius of curvature of the object-side surface of the fourthlens element is R7, a radius of curvature of the image-side surface ofthe fourth lens element is R8, a radius of curvature of the object-sidesurface of the fifth lens element is R9, a radius of curvature of theimage-side surface of the fifth lens element is R10,and they preferablysatisfy the relation: 0.5<R5/R6<1.8; 0.5<R7/R8<1.8; and 0.5<R9/R10<1.8.When the above relation is satisfied, the curvature of the third, fourthand fifth lens elements is not excessively large, which is favorable formanufacturing and assembling lens elements as well as correcting theastigmatism of the lens assembly.

In the aforementioned optical imaging lens assembly, an electronicsensor positioned on an image plane is further provided; a distance onan optical axis between the object-side surface of the first lenselement and the image plane is TTL, half of a diagonal length of aneffective pixel area of the electronic sensor is ImgH, and theypreferably satisfy the relation: TTL/ImgH<2.0. When the above relationis satisfied, it is favorable for keeping the optical imaging lenssystem compact so that the optical imaging lens system can be installedin compact electronic products.

On the other hand, the present invention provides an optical imaginglens assembly comprising five lens elements with refractive power, inorder from an object side to an image side: a first lens element withpositive refractive power having a convex object-side surface; a secondlens element with negative refractive power; a third lens element withnegative refractive power; a fourth lens element having a convexobject-side surface and a concave image-side surface, and at least oneof the object-side and image-side surfaces thereof being aspheric; and afifth lens element having a concave image-side surface, at least one ofthe object-side and image-side surfaces thereof being aspheric, and atleast one inflection point is formed on at least one of the object-sideand image-side surfaces thereof; wherein a focal length of the secondlens element is f2, a focal length of the third lens element is f3, theoptical imaging lens assembly further comprises an aperture stop, adistance on an optical axis between the aperture stop and an image planeis SL, a distance on the optical axis between the object-side surface ofthe first lens element and the image plane is TTL, and they satisfy therelation: 0<f2/f3<1.7; and 0.65<SL/TTL<0.92.

When the relation of 0<f2/f3<1.7 is satisfied, the distribution of thenegative refractive power of the second and the third lens elements ismore suitable for reducing the sensitivity and correcting the aberrationof the assembly effectively, preferably, the following relation issatisfied: 0<f2/f3<0.7.

When the relation of 0.65<SL/TTL<0.92 is satisfied, a good balancebetween telecentricity and the wide field of view can be achieved. Inthe aforementioned optical imaging lens assembly, a focal length of theoptical imaging lens assembly is f, a focal length of the third lenselement is f3, a focal length of the fourth lens element is f4, a focallength of the fifth lens element is f5, and they preferably satisfy therelation: 0<|f/f3|+|f/f4|+|f/f5|<0.8. When the above relation issatisfied, the refractive power of the third, fourth and fifth lenselements is adjusted well and thereby the sensitivity of the assemblycan be reduced.

In the aforementioned optical imaging lens assembly, a focal length ofthe third lens element is f3, a focal length of the fourth lens elementis f4, and they preferably satisfy the relation: |f3/f4|<0.90.

In the aforementioned optical imaging lens assembly, an Abbe number ofthe first lens element is V1, an Abbe number of the second lens elementis V2, and they preferably satisfy the relation: 30<V1−V2<42. When theabove relation is satisfied, the chromatic aberration of the assemblycan be favorably corrected.

In the aforementioned optical imaging lens assembly, an on-axis spacingbetween the second lens element and the third lens element is T23, afocal length of the optical imaging lens assembly is f, and theypreferably satisfy the relation: 0.40<(T23/f)*10<1.75. When the aboverelation is satisfied, the spacing between lens elements of the assemblyis more appropriate, which is not only good for lens elementsarrangement but also a good use of space for the lens assembly andkeeping the lens assembly compact.

In the aforementioned optical imaging lens assembly, a radius ofcurvature of the object-side surface of the third lens element is R5, aradius of curvature of the image-side surface of the third lens elementis R6, a radius of curvature of the object-side surface of the fourthlens element is R7, a radius of curvature of the image-side surface ofthe fourth lens element is R8, a radius of curvature of the object-sidesurface of the fifth lens element is R9, a radius of curvature of theimage-side surface of the fifth lens element is R10,and they preferablysatisfy the relation: 0.5<R5/R6<1.8; 0.5<R7/R8<1.8; and 0.5<R9/R10<1.8.When the above relation is satisfied, the curvature of the third, fourthand fifth lens elements is not excessively large, which is favorable formanufacturing and assembling of lens elements as well as correcting theastigmatism of the lens assembly.

In the aforementioned optical imaging lens assembly, an Abbe number ofthe first lens element is V1, an Abbe number of the second lens elementis V2, an Abbe number of the third lens element is V3, and theypreferably satisfy the relation: −10<V1−V2−V3<20. When the aboverelation is satisfied, the chromatic aberration of the assembly can befavorably adjusted and corrected.

In the aforementioned optical imaging lens assembly, an electronicsensor positioned on an image plane is further provided; a distance onan optical axis between the object-side surface of the first lenselement and the image plane is TTL, half of a diagonal length of aneffective pixel area of the electronic sensor is ImgH, and theypreferably satisfy the relation: TTL/ImgH<2.0. When the above relationis satisfied, it is favorable for keeping the optical imaging lenssystem compact so that the optical imaging lens system can be installedin compact electronic products.

In the aforementioned optical imaging lens assembly, the lens elementscan be made of glass or plastic material. If the lens elements are madeof glass, the freedom for distributing the refractive power of theoptical imaging lens assembly can be increased. If plastic material isadopted to produce the lens elements, the production cost will bereduced effectively. Additionally, the surfaces of the lens elements canbe aspheric and easily made into non-spherical profiles, allowing moredesign parameter freedom which can be used to reduce aberrations and thenumber of the lens elements used in an optical system. Consequently, thetotal track length of the optical imaging lens assembly can beeffectively reduced.

In the present optical imaging lens assembly, if a lens element isdescribed to have a convex surface, it means the portion of the surfacein proximity to the optical axis is convex; if a lens element isdescribed to have a concave surface, it means the portion of the surfacein proximity to the optical axis is concave.

In the present optical imaging lens assembly, one or more stops can beutilized in an optical system when necessary to eliminate unwanted lightrays (such as flare stops), to adjust the field of view (such as fieldstops), or for other means to improve the image quality.

Preferred embodiments of the present invention will be described in thefollowing paragraphs by referring to the accompanying drawings.

Embodiment 1

FIG. 1A shows an optical imaging lens assembly in accordance with thefirst embodiment of the present invention, and FIG. 1B shows theaberration curves of the first embodiment of the present invention. Theoptical imaging lens assembly of the first embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 110 with positive refractive power having aconvex object-side surface 111 and a convex image-side surface 112, theobject-side and image-side surfaces 111 and 112 thereof being aspheric;

a plastic second lens element 120 with negative refractive power havinga concave object-side surface 121 and a concave image-side surface 122,the object-side and image-side surfaces 121 and 122 thereof beingaspheric;

a plastic third lens element 130 with negative refractive power having aconcave object-side surface 131 and a convex image-side surface 132, theobject-side and image-side surfaces 131 and 132 thereof being aspheric;

a plastic fourth lens element 140 with negative refractive power havinga convex object-side surface 141 and a concave image-side surface 142,the object-side and image-side surfaces 141 and 142 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 141 and 142 thereof; and

a plastic fifth lens element 150 with positive refractive power having aconvex object-side surface 151 and a concave image-side surface 152, theobject-side and image-side surfaces 151 and 152 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 151 and 152 thereof;

wherein an aperture stop 100 is disposed between the first lens element110 and the second lens element 120;

the optical imaging lens assembly further comprises an IR filter 160disposed between the image-side surface 152 of the fifth lens element150 and an image plane 170, and the IR filter 160 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 170.

The equation of the aspheric surface profiles is expressed as follows:

${X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right)*\left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai})*\left( Y^{i} \right)}}}$

wherein:

X: the height of a point on the aspheric surface at a distance Y fromthe optical axis relative to the tangential plane at the asphericsurface vertex;

Y: the distance from the point on the curve of the aspheric surface tothe optical axis;

k: the conic coefficient;

Ai: the aspheric coefficient of order i.

In the first embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.52 (mm).

In the first embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.40.

In the first embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=32.0 deg.

In the first embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 110 is V1, the Abbe number ofthe second lens element 120 is V2, and they satisfy the relation:V1−V2=32.5.

In the first embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 110 is V1, the Abbe number ofthe second lens element 120 is V2, the Abbe number of the third lenselement 130 is V3,and they satisfy the relation: V1−V2−V3=9.1.

In the first embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 111 of the first lenselement 110 is R1, the radius of curvature of the image-side surface 112of the first lens element 110 is R2, and they satisfy the relation:|R1/R2|=0.03.

In the first embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 131 of the third lenselement 130 is R5, the radius of curvature of the image-side surface 132of the third lens element 130 is R6, and they satisfy the relation:R5/R6=0.79.

In the first embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 141 of the fourthlens element 140 is R7, the radius of curvature of the image-sidesurface 142 of the fourth lens element 140 is R8, and they satisfy therelation: R7/R8=1.14.

In the first embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 151 of the fifth lenselement 150 is R9, the radius of curvature of the image-side surface 152of the fifth lens element 150 is R10, and they satisfy the relation:R9/R10=1.06.

In the first embodiment of the present optical imaging lens assembly,the thickness of the second lens element 120 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=6.19.

In the first embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 120 and the thirdlens element 130 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.44.

In the first embodiment of the present optical imaging lens assembly,the focal length of the second lens element 120 is f2, the focal lengthof the third lens element 130 is f3, and they satisfy the relation:f2/f3=0.26.

In the first embodiment of the present optical imaging lens assembly,the focal length of the third lens element 130 is f3, the focal lengthof the fourth lens element 140 is f4, and they satisfy the relation:|f3/f4|=0.26.

In the first embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 130 is f3, a focal length of the fourth lenselement 140 is f4, a focal length of the fifth lens element 150 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.34.

In the first embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 100 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 111 of the first lens element 100 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.85.

In the first embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 111 ofthe first lens element 110 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.82.

The detailed optical data of the first embodiment is shown in FIG. 11(TABLE 1), and the aspheric surface data is shown in FIG. 12 (TABLE 2),wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 2

FIG. 2A shows an optical imaging lens assembly in accordance with thesecond embodiment of the present invention, and FIG. 2B shows theaberration curves of the second embodiment of the present invention. Theoptical imaging lens assembly of the second embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 210 with positive refractive power having aconvex object-side surface 211 and a concave image-side surface 212, theobject-side and image-side surfaces 211 and 212 thereof being aspheric;

a plastic second lens element 220 with negative refractive power havinga convex object-side surface 221 and a concave image-side surface 222,the object-side and image-side surfaces 221 and 222 thereof beingaspheric;

a plastic third lens element 230 with negative refractive power having aconcave object-side surface 231 and a convex image-side surface 232, theobject-side and image-side surfaces 231 and 232 thereof being aspheric;

a plastic fourth lens element 240 with negative refractive power havinga convex object-side surface 241 and a concave image-side surface 242,the object-side and image-side surfaces 241 and 242 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 241 and 242 thereof; and

a plastic fifth lens element 250 with negative refractive power having aconvex object-side surface 251 and a concave image-side surface 252, theobject-side and image-side surfaces 251 and 252 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 251 and 252 thereof;

wherein an aperture stop 200 is disposed between the first lens element210 and the second lens element 220;

the optical imaging lens assembly further comprises an IR filter 260disposed between the image-side surface 252 of the fifth lens element250 and an image plane 270, and the IR filter 260 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 270.

The equation of the aspheric surface profiles of the second embodimenthas the same form as that of the first embodiment.

In the second embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.79 (mm).

In the second embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.40.

In the second embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=30.6 deg.

In the second embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 210 is V1, the Abbe number ofthe second lens element 220 is V2, and they satisfy the relation:V1−V2=32.5.

In the second embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 210 is V1, the Abbe number ofthe second lens element 220 is V2, the Abbe number of the third lenselement 230 is V3,and they satisfy the relation: V1−V2−V3=9.1.

In the second embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 211 of the first lenselement 210 is R1, the radius of curvature of the image-side surface 212of the first lens element 210 is R2, and they satisfy the relation:|R1/R2|=0.01.

In the second embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 231 of the third lenselement 230 is R5, the radius of curvature of the image-side surface 232of the third lens element 230 is R6, and they satisfy the relation:R5/R6=0.86.

In the second embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 241 of the fourthlens element 240 is R7, the radius of curvature of the image-sidesurface 242 of the fourth lens element 240 is R8, and they satisfy therelation: R7/R8=1.11.

In the second embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 251 of the fifth lenselement 250 is R9, the radius of curvature of the image-side surface 252of the fifth lens element 250 is R10, and they satisfy the relation:R9/R10=1.16.

In the second embodiment of the present optical imaging lens assembly,the thickness of the second lens element 220 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=5.85.

In the second embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 220 and the thirdlens element 230 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.75.

In the second embodiment of the present optical imaging lens assembly,the focal length of the second lens element 220 is f2, the focal lengthof the third lens element 230 is f3, and they satisfy the relation:f2/f3=0.10.

In the second embodiment of the present optical imaging lens assembly,the focal length of the third lens element 230 is f3, the focal lengthof the fourth lens element 240 is f4, and they satisfy the relation:|f3/f4|=0.74.

In the second embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 230 is f3, a focal length of the fourth lenselement 240 is f4, a focal length of the fifth lens element 250 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.18.

In the second embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 200 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 211 of the first lens element 200 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.85.

In the second embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 211 ofthe first lens element 210 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.89.

The detailed optical data of the second embodiment is shown in FIG. 13(TABLE 3), and the aspheric surface data is shown in FIG. 14 (TABLE 4),wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 3

FIG. 3A shows an optical imaging lens assembly in accordance with thethird embodiment of the present invention, and FIG. 3B shows theaberration curves of the third embodiment of the present invention. Theoptical imaging lens assembly of the third embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 310 with positive refractive power having aconvex object-side surface 311 and a concave image-side surface 312, theobject-side and image-side surfaces 311 and 312 thereof being aspheric;

a plastic second lens element 320 with negative refractive power havinga concave object-side surface 321 and a concave image-side surface 322,the object-side and image-side surfaces 321 and 322 thereof beingaspheric;

a plastic third lens element 330 with negative refractive power having aconvex object-side surface 331 and a concave image-side surface 332, theobject-side and image-side surfaces 331 and 332 thereof being aspheric;

a plastic fourth lens element 340 with negative refractive power havinga concave object-side surface 341 and a convex image-side surface 342,the object-side and image-side surfaces 341 and 342 thereof beingaspheric; and a plastic fifth lens element 350 with positive refractivepower having a convex object-side surface 351 and a concave image-sidesurface 352, the object-side and image-side surfaces 351 and 352 thereofbeing aspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 351 and 352 thereof;

wherein an aperture stop 300 is disposed between an imaged object andthe first lens element 310;

the optical imaging lens assembly further comprises an IR filter 360disposed between the image-side surface 352 of the fifth lens element350 and an image plane 370, and the IR filter 360 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 370.

The equation of the aspheric surface profiles of the third embodimenthas the same form as that of the first embodiment.

In the third embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=5.35 (mm).

In the third embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.75.

In the third embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=33.5 deg.

In the third embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 310 is V1, the Abbe number ofthe second lens element 320 is V2, and they satisfy the relation:V1−V2=32.5.

In the third embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 310 is V1, the Abbe number ofthe second lens element 320 is V2, the Abbe number of the third lenselement 330 is V3,and they satisfy the relation: V1−V2−V3=9.1.

In the third embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 311 of the first lenselement 310 is R1, the radius of curvature of the image-side surface 312of the first lens element 310 is R2, and they satisfy the relation:|R1/R2|=0.28.

In the third embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 331 of the third lenselement 330 is R5, the radius of curvature of the image-side surface 332of the third lens element 330 is R6, and they satisfy the relation:R5/R6=1.21.

In the third embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 341 of the fourthlens element 340 is R7, the radius of curvature of the image-sidesurface 342 of the fourth lens element 340 is R8, and they satisfy therelation: R7/R8=0.88.

In the third embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 351 of the fifth lenselement 350 is R9, the radius of curvature of the image-side surface 352of the fifth lens element 350 is R10, and they satisfy the relation:R9/R10=0.96.

In the third embodiment of the present optical imaging lens assembly,the thickness of the second lens element 320 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=5.61.

In the third embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 320 and the thirdlens element 330 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=0.88.

In the third embodiment of the present optical imaging lens assembly,the focal length of the second lens element 320 is f2, the focal lengthof the third lens element 330 is f3, and they satisfy the relation:f2/f3=0.22.

In the third embodiment of the present optical imaging lens assembly,the focal length of the third lens element 330 is f3, the focal lengthof the fourth lens element 340 is f4, and they satisfy the relation:|f3/f4|=0.53.

In the third embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 330 is f3, a focal length of the fourth lenselement 340 is f4, a focal length of the fifth lens element 350 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.45.

In the third embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 300 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 311 of the first lens element 300 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.95.

In the third embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 311 ofthe first lens element 310 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.70.

The detailed optical data of the third embodiment is shown in FIG. 15(TABLE 5), and the aspheric surface data is shown in FIG. 16 (TABLE 6),wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 4

FIG. 4A shows an optical imaging lens assembly in accordance with thefourth embodiment of the present invention, and FIG. 4B shows theaberration curves of the fourth embodiment of the present invention. Theoptical imaging lens assembly of the fourth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 410 with positive refractive power having aconvex object-side surface 411 and a convex image-side surface 412, theobject-side and image-side surfaces 411 and 412 thereof being aspheric;

a plastic second lens element 420 with negative refractive power havinga concave object-side surface 421 and a concave image-side surface 422,the object-side and image-side surfaces 421 and 422 thereof beingaspheric;

a plastic third lens element 430 with negative refractive power having aconcave object-side surface 431 and a convex image-side surface 432, theobject-side and image-side surfaces 431 and 432 thereof being aspheric;

a plastic fourth lens element 440 with negative refractive power havinga convex object-side surface 441 and a concave image-side surface 442,the object-side and image-side surfaces 441 and 442 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 441 and 442 thereof; and

a plastic fifth lens element 450 with negative refractive power having aconvex object-side surface 451 and a concave image-side surface 452, theobject-side and image-side surfaces 451 and 452 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 451 and 452 thereof;

wherein an aperture stop 400 is disposed between an imaged object andthe first lens element 410;

the optical imaging lens assembly further comprises an IR filter 460disposed between the image-side surface 452 of the fifth lens element450 and an image plane 470, and the IR filter 460 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 470.

The equation of the aspheric surface profiles of the fourth embodimenthas the same form as that of the first embodiment.

In the fourth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.76 (mm).

In the fourth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.60.

In the fourth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=31.0 deg.

In the fourth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 410 is V1, the Abbe number ofthe second lens element 420 is V2, and they satisfy the relation:V1−V2=32.5.

In the fourth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 410 is V1, the Abbe number ofthe second lens element 420 is V2, the Abbe number of the third lenselement 430 is V3, and they satisfy the relation: V1−V2−V3=−23.4.

In the fourth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 411 of the first lenselement 410 is R1, the radius of curvature of the image-side surface 412of the first lens element 410 is R2, and they satisfy the relation:|R1/R2|=0.23.

In the fourth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 431 of the third lenselement 430 is R5, the radius of curvature of the image-side surface 432of the third lens element 430 is R6, and they satisfy the relation:R5/R6=0.83.

In the fourth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 441 of the fourthlens element 440 is R7, the radius of curvature of the image-sidesurface 442 of the fourth lens element 440 is R8, and they satisfy therelation: R7/R8=1.20.

In the fourth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 451 of the fifth lenselement 450 is R9, the radius of curvature of the image-side surface 452of the fifth lens element 450 is R10, and they satisfy the relation:R9/R10=1.27.

In the fourth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 420 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=8.00.

In the fourth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 420 and the thirdlens element 430 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.86.

In the fourth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 420 is f2, the focal lengthof the third lens element 430 is f3, and they satisfy the relation:f2/f3=0.14.

In the fourth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 430 is f3, the focal lengthof the fourth lens element 440 is f4, and they satisfy the relation:|f3/f4|=0.85.

In the fourth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 430 is f3, a focal length of the fourth lenselement 440 is f4, a focal length of the fifth lens element 450 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.41.

In the fourth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 400 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 411 of the first lens element 400 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.97.

In the fourth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 411 ofthe first lens element 410 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.82.

The detailed optical data of the fourth embodiment is shown in FIG. 17(TABLE 7), and the aspheric surface data is shown in FIG. 18 (TABLE 8),wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 5

FIG. 5A shows an optical imaging lens assembly in accordance with thefifth embodiment of the present invention, and FIG. 5B shows theaberration curves of the fifth embodiment of the present invention. Theoptical imaging lens assembly of the fifth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 510 with positive refractive power having aconvex object-side surface 511 and a convex image-side surface 512, theobject-side and image-side surfaces 511 and 512 thereof being aspheric;

a plastic second lens element 520 with negative refractive power havinga concave object-side surface 521 and a concave image-side surface 522,the object-side and image-side surfaces 521 and 522 thereof beingaspheric;

a plastic third lens element 530 with negative refractive power having aconcave object-side surface 531 and a convex image-side surface 532, theobject-side and image-side surfaces 531 and 532 thereof being aspheric;

a plastic fourth lens element 540 with negative refractive power havinga convex object-side surface 541 and a concave image-side surface 542,the object-side and image-side surfaces 541 and 542 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 541 and 542 thereof; and

a plastic fifth lens element 550 with positive refractive power having aconvex object-side surface 551 and a concave image-side surface 552, theobject-side and image-side surfaces 551 and 552 thereof being aspheric,and at least one inflection point is form on the image-side surface 552thereof;

wherein an aperture stop 500 is disposed between an imaged object andthe first lens element 510;

the optical imaging lens assembly further comprises an IR filter 560disposed between the image-side surface 552 of the fifth lens element550 and an image plane 570, and the IR filter 560 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 570.

The equation of the aspheric surface profiles of the fifth embodimenthas the same form as that of the first embodiment.

In the fifth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.29 (mm).

In the fifth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.85.

In the fifth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=33.4 deg.

In the fifth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 510 is V1, the Abbe number ofthe second lens element 520 is V2, and they satisfy the relation:V1−V2=32.5.

In the fifth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 510 is V1, the Abbe number ofthe second lens element 520 is V2, the Abbe number of the third lenselement 530 is V3, and they satisfy the relation: V1−V2−V3=−23.4.

In the fifth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 511 of the first lenselement 510 is R1, the radius of curvature of the image-side surface 512of the first lens element 510 is R2, and they satisfy the relation:|R1/R2|=0.24.

In the fifth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 531 of the third lenselement 530 is R5, the radius of curvature of the image-side surface 532of the third lens element 530 is R6, and they satisfy the relation:R5/R6=0.84.

In the fifth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 541 of the fourthlens element 540 is R7, the radius of curvature of the image-sidesurface 542 of the fourth lens element 540 is R8, and they satisfy therelation: R7/R8=1.76.

In the fifth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 551 of the fifth lenselement 550 is R9, the radius of curvature of the image-side surface 552of the fifth lens element 550 is R10, and they satisfy the relation:R9/R10=0.44.

In the fifth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 520 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=6.99.

In the fifth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 520 and the thirdlens element 530 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.86.

In the fifth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 520 is f2, the focal lengthof the third lens element 530 is f3, and they satisfy the relation:f2/f3=0.07.

In the fifth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 530 is f3, the focal lengthof the fourth lens element 540 is f4, and they satisfy the relation:|f3/f4|=10.98.

In the fifth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 530 is f3, a focal length of the fourth lenselement 540 is f4, a focal length of the fifth lens element 550 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=1.45.

In the fifth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 500 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 511 of the first lens element 500 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.97.

In the fifth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 511 ofthe first lens element 510 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.74.

The detailed optical data of the fifth embodiment is shown in FIG. 19(TABLE 9), and the aspheric surface data is shown in FIG. 20 (TABLE 10),wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 6

FIG. 6A shows an optical imaging lens assembly in accordance with thesixth embodiment of the present invention, and FIG. 6B shows theaberration curves of the sixth embodiment of the present invention. Theoptical imaging lens assembly of the sixth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 610 with positive refractive power having aconvex object-side surface 611 and a convex image-side surface 612, theobject-side and image-side surfaces 611 and 612 thereof being aspheric;

a plastic second lens element 620 with negative refractive power havinga convex object-side surface 621 and a concave image-side surface 622,the object-side and image-side surfaces 621 and 622 thereof beingaspheric;

a plastic third lens element 630 with negative refractive power having aconcave object-side surface 631 and a convex image-side surface 632, theobject-side and image-side surfaces 631 and 632 thereof being aspheric;

a plastic fourth lens element 640 with negative refractive power havinga convex object-side surface 641 and a concave image-side surface 642,the object-side and image-side surfaces 641 and 642 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 641 and 642 thereof; and

a plastic fifth lens element 650 with positive refractive power having aconvex object-side surface 651 and a concave image-side surface 652, theobject-side and image-side surfaces 651 and 652 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 651 and 652 thereof; and;

wherein an aperture stop 600 is disposed between the first lens element610 and the second lens element 620;

the optical imaging lens assembly further comprises an IR filter 660disposed between the image-side surface 652 of the fifth lens element650 and an image plane 670, and the IR filter 660 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 670.

The equation of the aspheric surface profiles of the sixth embodimenthas the same form as that of the first embodiment.

In the sixth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.25 (mm).

In the sixth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.78.

In the sixth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=33.7 deg.

In the sixth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 610 is V1, the Abbe number ofthe second lens element 620 is V2, and they satisfy the relation:V1−V2=32.5.

In the sixth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 610 is V1, the Abbe number ofthe second lens element 620 is V2, the Abbe number of the third lenselement 630 is V3, and they satisfy the relation: V1−V2−V3=−23.4.

In the sixth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 611 of the first lenselement 610 is R1, the radius of curvature of the image-side surface 612of the first lens element 610 is R2, and they satisfy the relation:|R1/R2|=0.12.

In the sixth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 631 of the third lenselement 630 is R5, the radius of curvature of the image-side surface 632of the third lens element 630 is R6, and they satisfy the relation:R5/R6=0.83.

In the sixth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 641 of the fourthlens element 640 is R7, the radius of curvature of the image-sidesurface 642 of the fourth lens element 640 is R8, and they satisfy therelation: R7/R8=1.50.

In the sixth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 651 of the fifth lenselement 650 is R9, the radius of curvature of the image-side surface 652of the fifth lens element 650 is R10, and they satisfy the relation:R9/R10=0.55.

In the sixth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 620 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=7.08.

In the sixth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 620 and the thirdlens element 630 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=2.22.

In the sixth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 620 is f2, the focal lengthof the third lens element 630 is f3, and they satisfy the relation:f2/f3=0.19.

In the sixth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 630 is f3, the focal lengthof the fourth lens element 640 is f4, and they satisfy the relation:|f3/f4|=2.82.

In the sixth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 630 is f3, a focal length of the fourth lenselement 640 is f4, a focal length of the fifth lens element 650 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=1.49.

In the sixth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 600 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 611 of the first lens element 600 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.89.

In the sixth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 611 ofthe first lens element 610 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.72.

The detailed optical data of the sixth embodiment is shown in FIG. 21(TABLE 11), and the aspheric surface data is shown in FIG. 22 (TABLE12), wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 7

FIG. 7A shows an optical imaging lens assembly in accordance with theseventh embodiment of the present invention, and FIG. 7B shows theaberration curves of the seventh embodiment of the present invention.The optical imaging lens assembly of the seventh embodiment of thepresent invention mainly comprises five lens elements, in order from anobject side to an image side:

a plastic first lens element 710 with positive refractive power having aconvex object-side surface 711 and a convex image-side surface 712, theobject-side and image-side surfaces 711 and 712 thereof being aspheric;

a plastic second lens element 720 with negative refractive power havinga concave object-side surface 721 and a concave image-side surface 722,the object-side and image-side surfaces 721 and 722 thereof beingaspheric;

a plastic third lens element 730 with negative refractive power having aconcave object-side surface 731 and a convex image-side surface 732, theobject-side and image-side surfaces 731 and 732 thereof being aspheric;

a plastic fourth lens element 740 with negative refractive power havinga convex object-side surface 741 and a concave image-side surface 742,the object-side and image-side surfaces 741 and 742 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 741 and 742 thereof; and

a plastic fifth lens element 750 with positive refractive power having aconvex object-side surface 751 and a concave image-side surface 752, theobject-side and image-side surfaces 751 and 752 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 751 and 752 thereof;

wherein an aperture stop 700 is disposed between the first lens element710 and the second lens element 720;

the optical imaging lens assembly further comprises an IR filter 760disposed between the image-side surface 752 of the fifth lens element750 and an image plane 770, and the IR filter 760 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 770.

The equation of the aspheric surface profiles of the seventh embodimenthas the same form as that of the first embodiment.

In the seventh embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.24 (mm).

In the seventh embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.80.

In the seventh embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=33.6 deg.

In the seventh embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 710 is V1, the Abbe number ofthe second lens element 720 is V2, and they satisfy the relation:V1−V2=32.5.

In the seventh embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 710 is V1, the Abbe number ofthe second lens element 720 is V2, the Abbe number of the third lenselement 730 is V3, and they satisfy the relation: V1−V2−V3=−23.4.

In the seventh embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 711 of the first lenselement 710 is R1, the radius of curvature of the image-side surface 712of the first lens element 710 is R2, and they satisfy the relation:|R1/R2|=0.13.

In the seventh embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 731 of the third lenselement 730 is R5, the radius of curvature of the image-side surface 732of the third lens element 730 is R6, and they satisfy the relation:R5/R6=0.84.

In the seventh embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 741 of the fourthlens element 740 is R7, the radius of curvature of the image-sidesurface 742 of the fourth lens element 740 is R8, and they satisfy therelation: R7/R8=1.66.

In the seventh embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 751 of the fifth lenselement 750 is R9, the radius of curvature of the image-side surface 752of the fifth lens element 750 is R10, and they satisfy the relation:R9/R10=0.49.

In the seventh embodiment of the present optical imaging lens assembly,the thickness of the second lens element 720 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=7.03.

In the seventh embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 720 and the thirdlens element 730 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=2.23.

In the seventh embodiment of the present optical imaging lens assembly,the focal length of the second lens element 720 is f2, the focal lengthof the third lens element 730 is f3, and they satisfy the relation:f2/f3=0.18.

In the seventh embodiment of the present optical imaging lens assembly,the focal length of the third lens element 730 is f3, the focal lengthof the fourth lens element 740 is f4, and they satisfy the relation:|f3/f4|=4.57.

In the seventh embodiment of the present optical imaging lens assembly,a focal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 730 is f3, a focal length of the fourth lenselement 740 is f4, a focal length of the fifth lens element 750 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=1.84.

In the seventh embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 700 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 711 of the first lens element 700 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.89.

In the seventh embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 711 ofthe first lens element 710 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.71.

The detailed optical data of the seventh embodiment is shown in FIG. 23(TABLE 13), and the aspheric surface data is shown in FIG. 24 (TABLE14), wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 8

FIG. 8A shows an optical imaging lens assembly in accordance with theeighth embodiment of the present invention, and FIG. 8B shows theaberration curves of the eighth embodiment of the present invention. Theoptical imaging lens assembly of the eighth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 810 with positive refractive power having aconvex object-side surface 811 and a convex image-side surface 812, theobject-side and image-side surfaces 811 and 812 thereof being aspheric;

a plastic second lens element 820 with negative refractive power havinga convex object-side surface 821 and a concave image-side surface 822,the object-side and image-side surfaces 821 and 822 thereof beingaspheric;

a plastic third lens element 830 with negative refractive power having aconcave object-side surface 831 and a convex image-side surface 832, theobject-side and image-side surfaces 831 and 832 thereof being aspheric;

a plastic fourth lens element 840 with positive refractive power havinga convex object-side surface 841 and a concave image-side surface 842,the object-side and image-side surfaces 841 and 842 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 841 and 842 thereof; and

a plastic fifth lens element 850 with positive refractive power having aconvex object-side surface 851 and a concave image-side surface 852, theobject-side and image-side surfaces 851 and 852 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 851 and 852 thereof;

wherein an aperture stop 800 is disposed between the first lens element810 and the second lens element 820;

the optical imaging lens assembly further comprises an IR filter 860disposed between the image-side surface 852 of the fifth lens element850 and an image plane 870, and the IR filter 860 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 870.

The equation of the aspheric surface profiles of the eighth embodimenthas the same form as that of the first embodiment.

In the eighth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.72 (mm).

In the eighth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.60.

In the eighth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=30.9 deg.

In the eighth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 810 is V1, the Abbe number ofthe second lens element 820 is V2, and they satisfy the relation:V1−V2=32.5.

In the eighth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 810 is V1, the Abbe number ofthe second lens element 820 is V2, the Abbe number of the third lenselement 830 is V3, and they satisfy the relation: V1−V2−V3=9.1.

In the eighth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 811 of the first lenselement 810 is R1, the radius of curvature of the image-side surface 812of the first lens element 810 is R2, and they satisfy the relation:|R1/R2|=0.03.

In the eighth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 831 of the third lenselement 830 is R5, the radius of curvature of the image-side surface 832of the third lens element 830 is R6, and they satisfy the relation:R5/R6=0.80.

In the eighth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 841 of the fourthlens element 840 is R7, the radius of curvature of the image-sidesurface 842 of the fourth lens element 840 is R8, and they satisfy therelation: R7/R8=1.00.

In the eighth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 851 of the fifth lenselement 850 is R9, the radius of curvature of the image-side surface 852of the fifth lens element 850 is R10, and they satisfy the relation:R9/R10=1.09.

In the eighth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 820 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=6.06.

In the eighth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 820 and the thirdlens element 830 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.41.

In the eighth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 820 is f2, the focal lengthof the third lens element 830 is f3, and they satisfy the relation:f2/f3=0.23.

In the eighth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 830 is f3, the focal lengthof the fourth lens element 840 is f4, and they satisfy the relation:|f3/f4|=0.17.

In the eighth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 830 is f3, a focal length of the fourth lenselement 840 is f4, a focal length of the fifth lens element 850 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.24.

In the eighth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 800 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 811 of the first lens element 800 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.86.

In the eighth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 811 ofthe first lens element 810 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.86.

The detailed optical data of the eighth embodiment is shown in FIG. 25(TABLE 15), and the aspheric surface data is shown in FIG. 26 (TABLE16), wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 9

FIG. 9A shows an optical imaging lens assembly in accordance with theninth embodiment of the present invention, and FIG. 9B shows theaberration curves of the ninth embodiment of the present invention. Theoptical imaging lens assembly of the ninth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 910 with positive refractive power having aconvex object-side surface 911 and a convex image-side surface 912, theobject-side and image-side surfaces 911 and 912 thereof being aspheric;

a plastic second lens element 920 with negative refractive power havinga concave object-side surface 921 and a concave image-side surface 922,the object-side and image-side surfaces 921 and 922 thereof beingaspheric;

a plastic third lens element 930 with negative refractive power having aconcave object-side surface 931 and a convex image-side surface 932, theobject-side and image-side surfaces 931 and 932 thereof being aspheric;

a plastic fourth lens element 940 with positive refractive power havinga convex object-side surface 941 and a concave image-side surface 942,the object-side and image-side surfaces 941 and 942 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 941 and 942 thereof; and

a plastic fifth lens element 950 with positive refractive power having aconvex object-side surface 951 and a concave image-side surface 952, theobject-side and image-side surfaces 951 and 952 thereof being aspheric,and at least one inflection point is form on both the object-side andimage-side surfaces 951 and 952 thereof;

wherein an aperture stop 900 is disposed between the first lens element910 and the second lens element 920;

the optical imaging lens assembly further comprises an IR filter 960disposed between the image-side surface 952 of the fifth lens element950 and an image plane 970, and the IR filter 960 is made of glass andhas no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 970.

The equation of the aspheric surface profiles of the ninth embodimenthas the same form as that of the first embodiment.

In the ninth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.31 (mm).

In the ninth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.40.

In the ninth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=33.2 deg.

In the ninth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 910 is V1, the Abbe number ofthe second lens element 920 is V2, and they satisfy the relation:V1−V2=32.5.

In the ninth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 910 is V1, the Abbe number ofthe second lens element 920 is V2, the Abbe number of the third lenselement 930 is V3, and they satisfy the relation: V1−V2−V3=9.1.

In the ninth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 911 of the first lenselement 910 is R1, the radius of curvature of the image-side surface 912of the first lens element 910 is R2, and they satisfy the relation:|R1/R2|=0.03.

In the ninth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 931 of the third lenselement 930 is R5, the radius of curvature of the image-side surface 932of the third lens element 930 is R6, and they satisfy the relation:R5/R6=0.76.

In the ninth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 941 of the fourthlens element 940 is R7, the radius of curvature of the image-sidesurface 942 of the fourth lens element 940 is R8, and they satisfy therelation: R7/R8=0.85.

In the ninth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 951 of the fifth lenselement 950 is R9, the radius of curvature of the image-side surface 952of the fifth lens element 950 is R10, and they satisfy the relation:R9/R10=1.05.

In the ninth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 920 on the optical axis is CT2,a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=6.80.

In the ninth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 920 and the thirdlens element 930 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.42.

In the ninth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 920 is f2, the focal lengthof the third lens element 930 is f3, and they satisfy the relation:f2/f3=0.32.

In the ninth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 930 is f3, the focal lengthof the fourth lens element 940 is f4, and they satisfy the relation:|f3/f4|=0.58.

In the ninth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 930 is f3, a focal length of the fourth lenselement 940 is f4, a focal length of the fifth lens element 950 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.49.

In the ninth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 900 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 911 of the first lens element 900 and the electronicsensor is TTL, and they satisfy the relation: SL/TTL=0.84.

In the ninth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 911 ofthe first lens element 910 and the electronic sensor is TTL, half of thediagonal length of the effective pixel area of the electronic sensor isImgH, and they preferably satisfy the relation: TTL/ImgH=1.79.

The detailed optical data of the ninth embodiment is shown in FIG. 27(TABLE 17), and the aspheric surface data is shown in FIG. 28 (TABLE18), wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

Embodiment 10

FIG. 10A shows an optical imaging lens assembly in accordance with thetenth embodiment of the present invention, and FIG. 10B shows theaberration curves of the tenth embodiment of the present invention. Theoptical imaging lens assembly of the tenth embodiment of the presentinvention mainly comprises five lens elements, in order from an objectside to an image side:

a plastic first lens element 1010 with positive refractive power havinga convex object-side surface 1011 and a concave image-side surface 1012,the object-side and image-side surfaces 1011 and 1012 thereof beingaspheric;

a plastic second lens element 1020 with negative refractive power havinga convex object-side surface 1021 and a concave image-side surface 1022,the object-side and image-side surfaces 1021 and 1022 thereof beingaspheric;

a plastic third lens element 1030 with negative refractive power havinga concave object-side surface 1031 and a convex image-side surface 1032,the object-side and image-side surfaces 1031 and 1032 thereof beingaspheric;

a plastic fourth lens element 1040 with positive refractive power havinga convex object-side surface 1041 and a concave image-side surface 1042,the object-side and image-side surfaces 1041 and 1042 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 1041 and 1042 thereof; and

a plastic fifth lens element 1050 with negative refractive power havinga convex object-side surface 1051 and a concave image-side surface 1052,the object-side and image-side surfaces 1051 and 1052 thereof beingaspheric, and at least one inflection point is form on both theobject-side and image-side surfaces 1051 and 1052 thereof;

wherein an aperture stop 1000 is disposed between the second lenselement 1020 and the third lens element 1030;

the optical imaging lens assembly further comprises an IR filter 1060disposed between the image-side surface 1052 of the fifth lens element1050 and an image plane 1070, and the IR filter 1060 is made of glassand has no influence on the focal length of the optical imaging lensassembly; the optical imaging lens assembly further comprises anelectronic sensor provided on the image plane 1070.

The equation of the aspheric surface profiles of the tenth embodimenthas the same form as that of the first embodiment.

In the tenth embodiment of the present optical imaging lens assembly,the focal length of the optical imaging lens assembly is f, and itsatisfies the relation: f=4.74 (mm).

In the tenth embodiment of the present optical imaging lens assembly,the f-number of the optical imaging lens assembly is Fno, and itsatisfies the relation: Fno=2.80.

In the tenth embodiment of the present optical imaging lens assembly,half of the maximal field of view of the optical imaging lens assemblyis HFOV, and it satisfies the relation: HFOV=30.1 deg.

In the tenth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 1010 is V1, the Abbe number ofthe second lens element 1020 is V2, and they satisfy the relation:V1−V2=32.1.

In the tenth embodiment of the present optical imaging lens assembly,the Abbe number of the first lens element 1010 is V1, the Abbe number ofthe second lens element 1020 is V2, the Abbe number of the third lenselement 1030 is

V3, and they satisfy the relation: V1−V2−V3=8.7.

In the tenth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 1011 of the firstlens element 1010 is R1, the radius of curvature of the image-sidesurface 1012 of the first lens element 1010 is R2, and they satisfy therelation: |R1/R2|=0.06.

In the tenth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 1031 of the thirdlens element 1030 is R5, the radius of curvature of the image-sidesurface 1032 of the third lens element 1030 is R6, and they satisfy therelation: R5/R6=0.77.

In the tenth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 1041 of the fourthlens element 1040 is R7, the radius of curvature of the image-sidesurface 1042 of the fourth lens element 1040 is R8, and they satisfy therelation: R7/R8=0.70.

In the tenth embodiment of the present optical imaging lens assembly,the radius of curvature of the object-side surface 1051 of the fifthlens element 1050 is R9, the radius of curvature of the image-sidesurface 1052 of the fifth lens element 1050 is R10, and they satisfy therelation: R9/R10=1.14.

In the tenth embodiment of the present optical imaging lens assembly,the thickness of the second lens element 1020 on the optical axis isCT2, a focal length of the optical imaging lens assembly is f, and theysatisfy the relation: (CT2/f)*100=5.91.

In the tenth embodiment of the present optical imaging lens assembly,the on-axis spacing between the second lens element 1020 and the thirdlens element 1030 is T23, a focal length of the optical imaging lensassembly is f, and they satisfy the relation: (T23/f)*10=1.73.

In the tenth embodiment of the present optical imaging lens assembly,the focal length of the second lens element 1020 is f2, the focal lengthof the third lens element 1030 is f3, and they satisfy the relation:f2/f3=0.35.

In the tenth embodiment of the present optical imaging lens assembly,the focal length of the third lens element 1030 is f3, the focal lengthof the fourth lens element 1040 is f4, and they satisfy the relation:|f3/f4|=1.14.

In the tenth embodiment of the present optical imaging lens assembly, afocal length of the optical imaging lens assembly is f, a focal lengthof the third lens element 1030 is f3, a focal length of the fourth lenselement 1040 is f4, a focal length of the fifth lens element 1050 is f5,and they satisfy the relation: |f/f3|+|f/f4|+|f/f5|=0.50.

In the tenth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the aperture stop 1000 and theelectronic sensor is SL, the distance on the optical axis between theobject-side surface 1011 of the first lens element 1000 and theelectronic sensor is TTL, and they satisfy the relation: SL/TTL=0.77.

In the tenth embodiment of the present optical imaging lens assembly,the distance on the optical axis between the object-side surface 1011 ofthe first lens element 1010 and the electronic sensor is TTL, half ofthe diagonal length of the effective pixel area of the electronic sensoris ImgH, and they preferably satisfy the relation: TTL/ImgH=1.98.

The detailed optical data of the tenth embodiment is shown in FIG. 29(TABLE 19), and the aspheric surface data is shown in FIG. 30 (TABLE20), wherein the units of the radius of curvature, the thickness and thefocal length are expressed in mm, and HFOV is half of the maximal fieldof view.

It is to be noted that TABLES 1-20 (illustrated in FIGS. 11-30respectively) show different data of the different embodiments, however,the data of the different embodiments are obtained from experiments.Therefore, any optical imaging lens assembly of the same structure isconsidered to be within the scope of the present invention even if ituses different data. The embodiments depicted above and the appendeddrawings are exemplary and are not intended to limit the scope of thepresent invention. TABLE 21 (illustrated in FIG. 31) shows the data ofthe respective embodiments resulting from the equations.

1. An optical imaging lens assembly comprising five lens elements withrefractive power, in order from an object side to an image side: a firstlens element with positive refractive power having a convex object-sidesurface; a second lens element with negative refractive power; a thirdlens element with negative refractive power; a fourth lens element withnegative refractive power, and at least one of the object-side andimage-side surfaces thereof being aspheric; and a fifth lens elementhaving a concave image-side surface, at least one of the object-side andimage-side surfaces thereof being aspheric, and the fifth lens elementis made of plastic; wherein a focal length of the second lens element isf2, a focal length of the third lens element is f3, and they satisfy therelation:0<f2/f3<1.7.
 2. The optical imaging lens assembly according to claim 1,wherein the fourth lens element is made of plastic, and at least oneinflection point is formed on at least one of the object-side andimage-side surfaces of the fifth lens element.
 3. The optical imaginglens assembly according to claim 2, wherein the second lens element hasa concave image-side surface, and the fifth lens element has a convexobject-side surface.
 4. The optical imaging lens assembly according toclaim 3, wherein the third lens element has a concave object-sidesurface and a convex image-side surface, and the fourth lens element hasa convex object-side surface and a concave image-side surface.
 5. Theoptical imaging lens assembly according to claim 4, wherein a focallength of the optical imaging lens assembly is f, a focal length of thethird lens element is f3, a focal length of the fourth lens element isf4, a focal length of the fifth lens element is f5, and they satisfy therelation:0<|f/f3|+|f/f4|+|f/f5|<1.7.
 6. The optical imaging lens assemblyaccording to claim 5, wherein a focal length of the optical imaging lensassembly is f, a focal length of the third lens element is f3, a focallength of the fourth lens element is f4, a focal length of the fifthlens element is f5, and they satisfy the relation:0<|f/f3|+|f/f4|+|f/f5|<0.8.
 7. The optical imaging lens assemblyaccording to claim 4, wherein an Abbe number of the first lens elementis V1, an Abbe number of the second lens element is V2, and they satisfythe relation:20<V1−V2<45.
 8. The optical imaging lens assembly according to claim 4,wherein the optical imaging lens assembly further comprises an aperturestop; a distance on an optical axis between the aperture stop and animage plane is SL, a distance on the optical axis between theobject-side surface of the first lens element and the image plane isTTL, and they satisfy the relation:0.65<SL/TTL<0.92.
 9. The optical imaging lens assembly according toclaim 4, wherein a focal length of the second lens element is f2, afocal length of the third lens element is f3, and they satisfy therelation:0<f2/f3<0.7.
 10. The optical imaging lens assembly according to claim 4,wherein the fifth lens element has positive refractive power.
 11. Theoptical imaging lens assembly according to claim 4, wherein a radius ofcurvature of the object-side surface of the first lens element is R1, aradius of curvature of the image-side surface of the first lens elementis R2, and they satisfy the relation:|R1/R2|<0.35.
 12. The optical imaging lens assembly according to claim4, wherein a thickness of the second lens element on the optical axis isCT2, a focal length of the optical imaging lens assembly is f, and theysatisfy the relation:3.0<(CT2/f)*100<9.3.
 13. The optical imaging lens assembly according toclaim 4, wherein an on-axis spacing between the second lens element andthe third lens element is T23, a focal length of the optical imaginglens assembly is f, and they satisfy the relation:0.40<(T23/f)*10<1.75.
 14. The optical imaging lens assembly according toclaim 2, wherein at least one inflection point is formed on at least oneof the object-side and image-side surfaces of the fourth lens element.15. The optical imaging lens assembly according to claim 2, wherein anAbbe number of the first lens element is V1, an Abbe number of thesecond lens element is V2, and they satisfy the relation:30<V1−V2<42.
 16. The optical imaging lens assembly according to claim 2,wherein an Abbe number of the first lens element is V1, an Abbe numberof the second lens element is V2, an Abbe number of the third lenselement is V3, and they satisfy the relation:−10<V1−V2−V3<20.
 17. The optical imaging lens assembly according toclaim 2, wherein the optical imaging lens assembly further comprises anaperture stop; a distance on an optical axis between the aperture stopand an image plane is SL, a distance on the optical axis between theobject-side surface of the first lens element and the image plane isTTL, and they satisfy the relation:0.92<SL/TTL<1.15.
 18. The optical imaging lens assembly according toclaim 2, wherein a radius of curvature of the object-side surface of thethird lens element is R5, a radius of curvature of the image-sidesurface of the third lens element is R6, a radius of curvature of theobject-side surface of the fourth lens element is R7, a radius ofcurvature of the image-side surface of the fourth lens element is R8, aradius of curvature of the object-side surface of the fifth lens elementis R9, a radius of curvature of the image-side surface of the fifth lenselement is R10,and they satisfy the relation:0.5<R5/R6<1.8;0.5<R7/R8<1.8; and0.5<R9/R10<1.8.
 19. The optical imaging lens assembly according to claim1, wherein the optical imaging lens assembly further comprises anelectronic sensor positioned on an image plane; a distance on an opticalaxis between the object-side surface of the first lens element and animage plane is TTL, half of a diagonal length of an effective pixel areaof the electronic sensor is ImgH, and they satisfy the relation:TTL/ImgH<2.0.